What is Click-Through Rate?

The CTR is the ratio of clicks to impressions on a certain campaign. This figure is calculated by taking the number of clicks on a campaign and diving it by the amount of impressions it received and converting it into a percentage.

In short, CTR = # Clicks / # Impressions

For example, if there are 10,000 impressions and 400 clicks on a campaign, it’s CTR would be 400/10,000=0.04, or 4%.